8 Responses. > 1  the Moon takes an elliptical path around the Earth. The planets make nearly elliptical orbits around the Sun, close enough for reasonable approximations, but the Moonâs Orbit around the Earth is sufficiently influenced by the Sun that it follows a path detectably different from an ellipse.
Quick Answer. In 1896, French scientist Antoine Henri Becquerel discovered radioactivity which was an early contribution to atomic theory. He discovered this phenomenon while experimenting with uranium and a photographic plate. Continue Reading.
Atom History Timeline Erwin Schrodinger John Dalton - Designed symbols to show how atoms combine to form other substances Ernest Rutherford - Discovery of the Nucleus! - Found that an atom is made up mainly of empty space J.J Thompson/Discovery Of Electrons - Thomson determined the charge to mass ratio (e/m) of an electron equaled 1.759 x 108 C/g through experiments he did with gas discharge tubes (Cathode Ray Tube Experiment) Democritus - Believed that the universe was made of tiny âindivisibleâ particles